I have been getting this on my FP6 with e/OS since I got it, and no manner of reflashing helps. What does help is not changing towers.
My phone is constantly flipping between EU and US regions, and being reprovisioned causes the reboot. This OTA reprovision happens every time I switch towers. If Im in a lower signal spot and tower jumping, the phone just goes into a constant spin
I believe this is because I am in Canada and for some odd reason e/OS chooses to NOT include the Canadian region (which is present in both AOSP and Lineage) and this causes me to be unable to choose the correct language and also is triggering this reprovisioning.
e/OS needs to include all global regions.